Panasonic 2WAY Multi - A10 Exhaust Gas Temperature High

IV–13
A10 Exhaust Gas Temperature High
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Error detection method
During engine operation (complete combustion), when the exhaust gas temperature ≥ 130°C continuously for 10
seconds, the engine is stopped momentarily and an error fl ag is set.
An Exhaust Gas Temp. High error is assumed when this fl ag has shut down the engine once.
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Troubleshooting
1
Exhaust gas
temperature
1-1 Measure the actual exhaust gas temperature. Is it high?
Yes 2-1
No 4-1
2
Coolant
amount
check
2-1
Is there any sign of the coolant leaking?
• Check the base and around the base.
• Check the amount in the reserve tank.
• Check the coolant route (detached hose, etc.)
OK 2-2
NG
Repair the leaks and
then refi ll with coolant
and perform an air
purge.
2-2
Is the coolant pump operating normally?
• Carry out an inspection while referring to A22.
• Are there any fl uctuations in coolant pump revolutions
or repeated starts/stops, etc., when the coolant pump is
operating?
OK 3-1
NG
There is a possibility
that air has become
mixed in, so refi ll with
coolant and perform an
air purge.
3
Exhaust
gas heat
exchanger
check
3-1
Is there heavy soiling on the inside of the exhaust gas tube on
the exhaust gas heat exchanger?
Yes
Replace the exhaust gas
heat exchanger
No 4-1
4
Wiring and
thermistor
check
4-1
Measure the resistance on the exhaust gas temperature
sensor (see “5. Reference Document” for details on thermistor
characteristics.)
OK
Outdoor unit’s power
board
NG Replace the sensor
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
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